investment fish

I need you guys help badly. I went fish store today and did my water test (water was on my 37 gallon tank been one day and filtered 24 hour) Ph 7.2 Nitrate 0 Kh 40 Nitrite 0 Ammonia 0 Chlorine 1.0 Gh 75 employee told me wait couple more days and after that I can get small kind off fishes. I...

Hi guys, Are pufferfish (particularly porcupine puffers) a good fish as a beginner to keep? What are the pro's & con's? Eventually I would love to breed puffers (all species) as I think they are absolutely adorable. However, are they a good investment fish? I've heard Porcupine puffers are...